E-resources
Peer reviewed
-
Srinithi, A.K.; Sepehri-Amin, H.; Tang, Xin; Tozman, P.; Li, J.; Zhang, J.; Kobayashi, S.; Ohkubo, T.; Nakamura, T.; Hono, K.
Journal of magnetism and magnetic materials, 07/2021, Volume: 529Journal Article
•Realizing a non-ferromagnetic Sm-rich intergranular phase in equilibrium with Sm(Fe,Co)11Ti.•Development of fine-grain sized Sm(Fe,Co)11Ti magnet with magnetically isolated 1:12 grains.•Discussion on possible weak-links to the coercivity of Sm(Fe,Co,Ti)12 magnets. Realizing a non-ferromagnetic intergranular phase for the ThMn12-type Sm(Fe,Co,Ti)12 compound is a prerequisite for developing high coercive magnets. In this work, we demonstrate that the addition of Ga into the Sm-(Fe,Co)-Ti system results in the formation of non-ferromagnetic Sm–Ga-rich intergranular phases with good wettability on Sm(Fe,Co,Ti)12 grains. In the Sm-(Fe,Co)-Ti system, when the alloy composition was varied to the Sm-rich region as Sm1+w(Fe0.8Co0.2)11Ti (w = 0–0.7), soft ferromagnetic C15-type Sm(Fe,Co)2 intergranular phase and TbCu7-type Sm(Fe,Co,Ti)~7 phase formed along with the ThMn12-type main phase in the as-cast alloy. We demonstrated that by introducing Ga, the formation of these secondary soft ferromagnetic phases can be hindered as the excess Sm and Ga formed non-ferromagnetic Ba5Si3-type Sm5Ga3 and TII-type SmGa intergranular phases with an excellent wettability on Sm(Fe,Co,Ti)12 grains. Fine Sm(Fe,Co,Ti)12 grains of 1–2 µm, well isolated by the Sm–Ga-rich intergranular phase, were realized by melt-spinning the Ga-doped alloy and the maximum coercivity obtained was 0.5 T. According to the detailed microstructure characterizations, the weak-links to the coercivity of this novel microstructure of well-isolated and fine Sm(Fe,Co,Ti)12-based grains is the presence of defects at the interfaces which could lead to a locally reduced magneto-crystalline anisotropy.
Author
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.